Water/Alkali-Catalyzed Reactions of Azides with 2-Cyanothioacetamides. Eco-Friendly Synthesis of Monocyclic and Bicyclic 1,2,3-Thiadiazole-4-carbimidamides and 5-Amino-1,2,3-triazole-4-carbothioamides
作者:Valeriy O. Filimonov、Lidia N. Dianova、Tetyana V. Beryozkina、Dmitrii Mazur、Nikolai A. Beliaev、Natalia N. Volkova、Vladimir G. Ilkin、Wim Dehaen、Albert T. Lebedev、Vasiliy A. Bakulev
DOI:10.1021/acs.joc.9b01599
日期:2019.11.1
extended to the one-pot reaction of sulfonyl chlorides and 6-chloropyrimidines 2'o with sodium azide, leading to final products in higher yields, that is, avoiding the isolation of unsafe sulfonyl azides. The method was furthermore applied to the reaction of N,N'-bis-(2-cyanothiocarbonyl)pyrazine 1h with sulfonyl azides to afford bicyclic 1,2,3-thiadiazoles 8 and 1,2,3-triazoles 9 connected via a 1,1'-piperazinyl
研究了硫酰胺与叠氮化物在水中的反应。可靠地表明,2-氰基硫代乙酰胺1与各种类型的叠氮化物2在碱存在下的水中反应是一种高效,通用,一步一步,原子经济且生态友好的合成1的方法, 2,3-噻二唑-4-碳二酰亚胺5和1,2,3-三唑-4-碳硫酰胺4。该方法可以扩展到磺酰氯和6-氯嘧啶2'o与叠氮化钠的一锅反应,导致最终产品的收率更高,即避免了分离不安全的磺酰叠氮化物。该方法进一步应用于N,N′-双-(2-氰基硫代羰基羰基)吡嗪1h与磺酰基叠氮化物的反应,得到通过1连接的双环1,2,3-噻二唑8和1,2,3-三唑9。 ,1'-哌嗪基接头。